Alan Cox wrote:
Fix handling of the PIO modes for the pre-EIDE drives that did not support the PIO Flow Control Transfer Mode value (00001 nnn) of the Set Transfer Mode feature by skipping the actual mode programming.
You also need to cater for CF 1.1 compliant devices which do not have set xfer mode.
Do they have IORDY support?
Good question.
I thought you know. :-)
CF 1.4 says set features supports 01/0A/55/66/81/8A/9A/BB/CC (with 69/96/97 NOP or not recommended)
Well, the same spec says IORDY may be supported and bit 11 of word 49 may be set. Obviously, no PIO3/4 though.
However it documents both the PIO mode and DMA word in identify. I've
So what? That's PIO2 at max, and *default* mode at that, not changeable.
never seen a CF 1.x card which does DMA or PIO > 2.
That's something at least. I hope they also don't set bit 11 -- otherwise, bad luck. Or am I supposed to also check the CF signature? :-)
CF 1.x is sort of ATA-2 ish but without some set features (eg its got idle immediate) and with some stuff that became general later (security features)
Well, at least CF 2.1 documents every imaginable feature value, it seems, including Set Transfer Mode of all flavors.
Alan
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